Screw gauge and drill stand



May 14, 1968 R. BAGIAN ETAL.

SCREW GAUGE AND DRILL STAND Filed July 5, 1966 M h M 5W D M H m UnitedStates Patent O 3,382,987 SCREW GAUGE AND DRILL STAND Richard Bagan andJoseph Zierau, both of @6x-19 Britton Ave., Elmhurst, N.Y. 11373 FiledJuly 5, 1966, Ser. No. 562,781 1 Claim. (Cl. 21.1--69) ABSTRACT F THEDISCLOSURE A screw gauge and drill stand for rapidly determining theappropriate body and top drills for various screw sizes and providingconvenient storage for said drills.

This invention relates to a combination screw gauge and drill stand asused by mechanics and the like.

The principal objects of this invention is to provide a new and improvedcombination screw gauge and drill stand which stores removably acollection of drill bits and enables the user to select a proper tapdrill size and body drill size as well as a proper tap for a givendiameter hole.

Another object is to provide a new and improved combination screw gaugeand drill stand for the character indicated which can be manufacturedeasily and inexpensively.

All of the foregoing and still further objects and advantages of ourinvention will now be described with reference to this specification andto the accompanying drawings wherein:

FIGURE 1 is a perspective view of our invention;

FIGURE 2 is a view through 2-2 in FIGURE 1;

FIGURE 3 illustrates a step in using our invention; and

FIGURE 4 illustrates another step in using our invention.

Referring now to FIGURES 1-4, there is shown a vertical plate likeelongated member having a hole 12 at the top end thereof which can beused in detachably securing the member to a wall or other supportingsurface. Member 10 has a at vertical center section 14 with flatvertical side sections 16 extending away from the section at oppositelydirected acute angles A thereto.

Section 14 contains four columns, the first and second columns at theleft having a common heading Screw or Tap Size, the third column beingheaded Tap Drill, the fourth column being headed Body Drill. The firstcolumn carries a plurality of pairs of numbers (i.e. two numbersseparated by a hyphen) arranged vertically, with the set of rst numbersin these pairs being arranged in ascending order, the set of the secondnumbers being arranged in descending order. The second column con# tainsa plurality of threaded holes 18 arranged vertically one below theother. The number pair in the same row with a particular hole identitiesthe screw or tap size for this hole. The third column contains aplurality of tap drill sizes arranged in descending order, each tapdrill size being that of the threaded hole in the corresponding row. Thefourth column contains a plurality of body drill sizes arranged indescending order, each body drill size being that of the threaded holein the corresponding row. Note that each hole has an unthreaded portion20 of given diameter (known as the pilot hole) followed by la threadedportion 22, the inner thread diameter being the requisite tap drillsize, the outer thread diameter being the requisite body drill size. I

Each side section 16 carries a plurality of drill sizes arranged inascending order in the left hand section and in descending order on theright hand section. Each section carries aligned with each drill size acorresponding drill hole or bore 24 oriented to extend upward from theside section and outward from the center section and side section. Adrill 26 of proper size is detachably positioned in each one of holes24.

Our invention can be employed to drill a threaded hole for example foruse with a given screw 2S. To this end, the screw is tted into one andanother of holes 18 until a hole of proper size and thread is found onmember 10. The reading in the corresponding entry in i the first columnin the same row will give the size of mit the user to select and removethe appropriate drills from the side sections. These drills and tap canthen be used to drill and tap the right size hole.

While we have described our invention with particular reference to thedrawings, our protection is to be limited only by the terms of theclaims which follow.

Having thus set forth and disclosed the nature of this invention, whatis claimed is:

1. A combination screw gauge and drill stand comprising a verticalplate-like elongated member having a front flat vertical center sectionwith oppositely disposed front side sections extending away from thecenter section at oppositely directed equal acute angles, each sidesection having a plurality of drill holes, said holes being disposedvertically one below the other, each hole being oriented to extendupward from the corresponding side section and a plurality ofdifferently sized drills equal to the total plurality of holes in bothside sections, each drill being detacbably stored in a corresponding oneof said drill holes, the two edges of said center section adjacent saidside sections bearing vertically displaced numbers each identifying adifferent one of the drill sizes, each drill being disposed horizontally4adjacent the number identifying its drill size wherein said centersection contains a plurality of vertically spaced tapped holes ofditferent diameters arranged in a column including an additional columncontaining a like plurality of indicia arranged in vertically spacedrelation each indicia horizontally aligned with the corresponding tappedhole and identifying size for this hole, including a third columncontaining a like number of vertically spaced indicia each alignedhorizontally with the corresponding tapped hole and identifying the tapdrill size and a fourth column containing a like number of verticallyspaced indicia, each aligned horizontally with the corresponding tappedhole and identifying the body drill size thereof.

References Cited UNITED STATES PATENTS 1,104,650 7/1914 Fries 2l 1-69 X1,246,536 11/1917 Bristol 211-69 2,260,086 10/1941 Matter 211--692,267,008 12/1941 Zimmer 211-69 FOREIGN PATENTS 234,195 6/ 1925 GreatBritain.

CHANCELLOR E. HARRIS, Primary Examiner.

